Right, Ive had this tank for a little under a year after upgrading from a 10 gallon I had for over 5 years; Its a 20 gallon high with a Penn Plax cascade 200, with a female betta, 8 or so adult guppies(perhaps 2 handfuls of very young fry, i clean out their box twice a week) 8 neon tetras, an 3...